explain the role of plants in maintaining the water table in soil
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The role of plants in maintaining water table in soil:
Irrigation is the application of water to ensure sufficient soil moisture is available for good plant growth throughout the growing season. Irrigation, as practiced in North Dakota, is called "supplemental irrigation" because it augments the rainfall that occurs prior to and during the growing season.
Irrigation often is used on full-season agronomic or high-value specialty crops to provide a dependable yield every year. It also is used on crops such as potatoes, flowers, vegetables and fruits where water stress affects the quality of the yield.
Most years, some places in the state receive sufficient rainfall for good plant growth. But in many of those years, other areas of the state experience reduced yields and/or reduced quality on nonirrigated crops due to water stress from insufficient soil moisture.
For irrigation planning purposes, the average precipitation during the growing season is not a good yardstick to determine a need for irrigation. The timing and amounts of rainfall during the season, the soil's ability to hold water and the crop's water requirements are all factors that influence the need for irrigation. Any location in the state can have what might be considered "wet or dry" weeks, months and even years.